print('111')
print("2222")
print("""333
444""")
str="hello world"
print(str.split())
print(str.split('o'))
str1="*"
str2="hello python"
print(str1.join(str2))
start='hello'
end='world'
print(start+end)
str3='@hello world@'
print(str3.strip("@"))
print(str3.lstrip("@"))
print(str3.rstrip('@'))
# 1009